JEE Chemistry - MCQ Practice Questions

The standard reduction potential of H⁺/H₂ electrode is taken as 0.00 V because:

What is the effect of temperature on the conductivity of ionic solutions?

The electrochemical series is based on which property?

Which factor does NOT significantly affect the conductance of an electrolytic solution?

The rate of a chemical reaction is defined as the change in concentration of reactants or products per unit time. Which of the following is NOT a factor affecting reaction rate?

The half-life of a zero-order reaction is:

A reaction has a rate constant of k = 2.5 × 10⁻⁴ s⁻¹ at 298 K. What is the order of this reaction if the units of k are s⁻¹?

Which of the following statements about activation energy (Eₐ) is correct?

The collision theory of reaction rates explains that a reaction occurs when molecules collide with:

For the reaction 2NO + Cl₂ → 2NOCl, the rate law is found to be Rate = k[NO]²[Cl₂]. The order with respect to NO is:

A zero-order reaction has an initial concentration of 0.5 M and rate constant k = 0.02 M/s. The time taken for the concentration to reduce to 0.1 M is:

In a reaction mechanism with fast pre-equilibrium followed by slow step, which statement is correct?

For the reaction: A + B → Products with Rate = k[A][B]², what is the overall order of reaction?

A catalyst increases the rate of reaction by:

For a reaction with rate law Rate = k[A]⁰[B]¹, if [B] is increased 4 times while [A] remains constant, the rate increases by:

For the reaction A → B, experimental data shows: [A] vs time is a straight line. This indicates:

For an elementary reaction: A + A + B → Products, the rate law is:

For the reaction 2NO + O₂ → 2NO₂, the rate law is Rate = k[NO]²[O₂]. What is the overall order of reaction?

Half-life of a first-order reaction is 30 minutes. What fraction of reactant remains after 90 minutes?

Which of the following statements about collision theory is INCORRECT?